A Study on Prevalence of Trigger Factors and Associated Disorders in Tension-type Headache

To study the prevalence of trigger factors and associated disorders in tension-type headache (TTH). Trigger factors have been widely studied in the context of migraine, but very few studies have investigated trigger factors in the context of TTH.

A total of 400 patients above the age of 15 years fulfilling the third edition of the International Classification of Headache Disorders (ICHD 3) criteria of frequent episodic tension-type headache (FETTH) and chronic tension-type headache (CTTH) were enrolled and evaluated using a questionnaire. Details regarding demographics, headache characteristics, triggers, and associated symptoms were obtained. Associated psychiatric disorders were also recorded. Data were analyzed using Microsoft Excel and statistical analysis was done using SPSS 22 trial version. Chi-square test and Fischer's exact test were used for statistical analysis and subgroup comparison.

Out of 400 patients, 360 (90%) were found to have triggers. The mean headache intensity on visual analog scale (VAS) was 6.7. The most common trigger factor was emotional stress among both males and females. There was a statistically significant difference in the frequency of trigger factors between men and women for emotional stress, sunlight, sleep deprivation/insomnia, noise, weather change, studying, fried food, and hypersomnia. Psychiatric comorbidity was found in 29% of individuals, with sleep disorder being the most common.

TTH has been an underrated diagnosis despite being an extremely common disorder. The trigger factors are less studied and their interactions are lesser known. The diagnostic criteria as per ICHD 3 make TTH a diagnosis of exclusion, rather than a positive diagnosis of inclusion. The trigger factors must be included in the diagnostic criteria in future versions of ICHD and associated psychiatric disorders should be sought for and treated simultaneously for better management and quality of life.